something curious

"'Curiouser and curiouser', said Alice".

While repotting my Epidendrum the other day I noticed something that looked like small bumps on the leaves, just a few and spread out un-uniformly. There is no yellowing or discolouration of any kind. I am wondering if anyone might be familiar with what this might be. I have not noticed anything similar on any of my other orchids, and I don't have any creepy crawlies (I took a good look through the old media when I was repotting).

Have no advice for you on what they are, but I get these occasionally on some of my plants, especially on the dendrobiums and occasionally on my miserable Phalaenopsis. It has never been a cause of concern for me. Maybe someone out there actually has a scientific and botanical explanation of what they are/what causes them?
MDE

could be something called 'edema'. it happens when the humidity is high and the plant has too much water available. if i recall correctly, it is trying to get rid of the excess water through its 'pores' but it can't do it fast enough, hence the bumps. not a big deal, though it will leave scars where the bumps were once it dries out.

Zits! ..... might be from when they were outside and something punctured the leaf ? just a guess ... as long as the bumps are not brown ...I have seen zits on a Phal. leaf they never did anything . Gin

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